The figures, which are part of the ONS’ Migrant labour force within the construction industry report, includes those involved with the construction of buildings including the development of buildings, infrastructure works and specialised construction including demolition, electrical and plumbing.

The numbers do not include sectors such as architectural and engineering services and quantity surveying meaning the number of EU nationals working across the sector is likely to be significantly higher.

The figures also revealed an ageing local workforce, with 47% of UK construction workers aged 45 and over, compared to just 18% for non-UK workers.

Manny Aparicio, national head of project management at Naismiths, said the figures showed it was “crunch time for the UK construction industry”.

He said: “The London construction sector is particularly exposed to potential fallout from Brexit, as more than a third of its workers are from EU and non-EU countries.

“We have an ageing workforce of UK construction workers that is simply not being replenished at the required rate. Once a significant percentage of UK construction workers retire, and that day is fast approaching, the sector will struggle.

“The youngest blood in UK construction is currently the non-UK nationals but if Brexit makes the UK a less attractive place to work then that demographic could disappear at the same time as the older UK hands retire. It’s a double whammy.

“If Brexit does make it harder for overseas workers to take up jobs in construction, due to increased red tape and potential costs, the construction industry will suffer.”

He said those involved with the construction sector needed to recognise the potential cost increase of workers during the decade ahead.